Packing device

ABSTRACT

A packing device comprises a sealing apparatus ( 100 ) for sealing film bags, a packing apparatus ( 300 ) for packing workpieces and film, and a driving apparatus ( 200 ) for pulling the film and driving the sealing apparatus. The sealing apparatus comprises a pair of sealing blocks ( 10 ) and ( 20 ), the sealing blocks respectively comprise two pressing portions each defining a receiving hole therein, and the receiving holes respectively receive a heating pole ( 122 ) therein to supply heat.

FIELD OF THE INVENTION

The present invention pertains to a packing device, and particularly to a packing device for packing film bags.

DESCRIPTION OF RELATED ART

In a conventional workpiece packing method, a number of film bags are manually picked up one by one and opened, and the workpieces are then manually packed in the plastic film bags. However, since the packing is carried out manually, efficiency is low, and cost is high when a large number of workpieces are to be packed.

Therefore, a need exists in the industry to overcome the aforementioned deficiencies and inadequacies.

SUMMARY OF THE INVENTION

In an exemplary embodiment, a packing device comprises a packing apparatus for packing film bags with workpieces, a sealing apparatus for making film bags, and a driving apparatus for pulling the film and driving the sealing apparatus. The sealing apparatus comprises a pair of sealing blocks, the sealing blocks respectively comprise two pressing portions each defining a receiving hole therein, and the receiving holes respectively receive a heating pole therein to supply heat. The packing device combines processes of making film bags and packing workpieces.

Other advantages and novel features will become more apparent from the following detailed description of preferred embodiments when taken in conjunction with the accompanying drawings, in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an assembled view of a packing device of an exemplary embodiment of the present invention, the packing device including a packing apparatus, a driving apparatus, and a packing apparatus;

FIG. 2 is an enlarged, isometric view of two sealing blocks of the sealing apparatus of FIG. 1;

FIG. 3 is an enlarged, isometric view of a pressing portion of the driving apparatus of FIG. 1;

FIG. 4 is an enlarged, isometric view of a cam of the driving apparatus of FIG. 1;

FIG. 5 is an enlarged, inverted, isometric view of a packing channel of the packing apparatus of FIG. 1; and

FIG. 6 is an assembled view of the packing device oriented to a second position.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIG. 1, a packing device of an exemplary embodiment of the present invention is shown. The packing device comprises a sealing apparatus 100, a driving apparatus 200, and a packing apparatus 300.

Referring also to FIG. 2, the sealing apparatus 100, used for sealing film bags, comprises a sealing block 110 and a sealing block 120. The sealing blocks 110 and 120 are made of heat conductive material. The sealing block 110 comprises a pressing portion 116 and a pressing portion 118 vertically and integrally formed with the pressing portion 116. The sealing block 120 comprises a pressing portion 126 and a pressing portion 128 vertically and integrally formed with the pressing portion 126. The pressing portion 116, the pressing portion 118, the pressing portion 126, and the pressing portion 128 respectively define a receiving hole 112 therein to receive a heating pole 122. The heating poles 122 supply heat for fusing free edges of a piece of folded film to form the film bags, and in the exemplary embodiment, the film comprises plastic. The pressing portion 116 defines a groove 1165 in a side 1167 thereof, and the groove 1165 receives a zigzag knife-blade 1162 therein. The pressing portion 126 defines a groove 1265 in a side 1267, corresponding to the groove 1165, and the groove 1265 receives a cushion 1262 made of heat-resistant material therein. In a sealing process, the cushion 1262 prevents the knife-blade 1162 from impacting the pressing portion 122. A plurality of threaded holes 164 is defined in the pressing portion 116 in a side adjacent to the side 1167 thereof, communicating with the groove 1165. A plurality of bolts 166 is screwed in the threaded holes 164 to fix the knife-blade 1162 in the groove 1165. The sides 1167 and 1267 each define a plurality of channels and ridges thereon for fusing wave-shaped seams on surfaces of the film bags when the surfaces of the film bags are pressed therebetween. The wave-shaped fused seams prevent the fused portions of the film bags from separating accidentally. The channels of the sides 1167, 1267 align with the ridges of the sides 1267, 1167 respectively. The pressing portion 116 further comprises a plurality of threaded holes 168 in a side opposite to the side 1167, and correspondingly, the pressing portion 126 also comprises a plurality of threaded holes (not shown) in a side opposite to the side 1267.

Referring also to FIG. 3, the driving apparatus 200 comprises a controlling portion 230. The controlling portion 230 comprises a first portion 232 and a second portion 234. The first portion 232 comprises a mounting portion 2322, and a curved clamp portion 2324 integrally formed with the mounting portion 2322. The mounting portion 2322 defines a plurality of through holes 2328 therein corresponding to the threaded holes 168 of the pressing portion 116. The second portion 234 comprises a mounting portion 2342, and a curved clamp portion 2344 integrally formed with the mounting portion 2342. The mounting portion 2344 defines a plurality of through holes 2348 therein corresponding to the threaded holes of the pressing portion 126. A plurality of bolts 2682 is threadedly fixed in the threaded holes 168 through the through holes 2328 to fix the mounting portion 2322 to the pressing portion 116. A plurality of bolts 2682 is threadedly fixed in the threaded holes of the pressing portion 126 through the through holes 2348 to fix the mounting portion 2342 to the pressing portion 126.

A connecting portion 2326 projects from a side of the mounting portion 2322 near the join of the mounting portion 2322 and the clamp portion 2324, and the connecting portion 2326 defines a through hole 23262 therein. Two connecting portions 2346 respectively defining a through hole 23462 therein project in parallel from a side of the mounting portion 2342. In assembly, the connecting portion 2326 is received between the two connecting portions 2346, and the through hole 23262 communicates with the two through holes 23462. A pole 280 passes through the through hole 23262 and the through holes 23462 to assemble the first portion 232 and the second portion 234 together.

The clamp portion 2344 comprises a projecting portion 262 defining a through hole 2622 therein, and the clamp portion 2324 also comprises a projecting portion (not shown) having a through hole (not shown) therein. A spring 236 is fixed between the clamp portion 2324 and the clamp portion 2344 with two ends respectively latched in the through hole 2622 and the through hole of the projecting portion of the clamp portion 2324. The clamp portion 2324 further comprises a wheel 238 mounted on an end thereof far from the mounting portion 2322, and another wheel 238 is mounted on the clamp portion 2344 in the same way and opposite to the wheel 238 of the clamp portion 2324.

Referring also to FIG. 4, the driving apparatus 200 further comprises a cam 240 mounted between the two wheels 238, and a pair of pulling wheels 250 mounted under the sealing blocks 110 and 120. The cam 240 comprises two semicircular end portions 242, and a waist 244 between the two end portions 242. The waist 244 defines a through hole 2442 therein surrounded by an inner wall 2446. The inner wall 2446 defines a slot 2444 therein. A shaft 260 passes through the through hole 2442, and a projecting portion 262 projecting from the shaft 260 is received in the through slot 2444. A motor (not shown) is used to rotate the shaft to drive the cam 240.

Referring to FIGS. 1 and 5, the packing apparatus 300 comprises a packing channel 370. The packing channel 370 is located above the sealing block 110 and sealing block 120. The packing channel 370 comprises a receiving portion 372 for receiving the workpieces and the film and guiding them into position in a packing portion 374 integrally formed with the receiving portion 372. The packing portion 374 is U-shaped in cross-section for positioning the film containing the work pieces, to be fused, and an open side of the packing portion 374 faces to the sealing blocks 110 and 120.

Before the sealing process is carried out, the film is pulled down through the packing channel 370, and into the packing portion 374. A shape of the packing portion 374 causes the film to fold into a form of a bag. An open side of the folded film is placed between the two pulling wheels 250, and the pulling wheels 250 pull the film down during the packing process.

Referring to FIG. 1, the packing device is oriented to a first position in use. In the first position, referring also to FIG. 3, the two wheels 238 of the clamp portions 2324 and 2344 abut against the waist 244. The spring 236 is in an original state, and the mounting portions 2322 and 2342 are separated in a largest angle. The sealing blocks 110 and 120 are separated.

Referring to FIG. 6, the cam 240 is rotated 90 degrees and the packing device is oriented to a second position. In the second position, the spring 236 is in an elongated state, and the two wheels 238 respectively abut against the two end portions 242 of the cam 240. The sealing blocks 110 and 120 are closed. At this time, if the cam 240 is rotated 90 degrees again, the packing device returns to the first position.

While the packing device is being changed from the first position to the second position, the clamp portions 2324 and 2344 are pushed outward along with the rotation of the cam 240. And the first portion 232 and the second portion 234 rotate around the pole 280 reversely. Thereby, the mounting portion 2322 and the mounting portion 2344 are driven towards each other. Accordingly, the sealing block 110 fixed to the mounting portion 2322 and the sealing block 120 fixed to the mounting portion 2342 are pushed toward each other.

While the packing device is transferred from the second position to the first position, along with the rotation of the cam 240, the clamp portion 2344 and the clamp portion 2324 are pulled back by the spring 236 until the wheels 238 abut against the waist 114 again.

Along with the rotation of the cam 240, the sealing blocks 110 and 120 are opened or closed. And because the sealing blocks 110 and 120 respectively comprise two pressing portions formed vertically with each other, the open side and a traverse portion of the folded model between the sealing blocks 110 and 120 are fused by heat emanating from the heating poles 122, to form a film bag with an open upside. Because of the zigzag knife-blade 1162 received in the pressing portion 116, the traverse portion of the film that is fused is incised into a discontinuously severed state. When a film bag with an upside open is made, the workpieces are packed into the film bag along the packing channel 370 and the film. And then the two pulling wheels 250 pull the film bag down, and the open upside of the film bag is fused in a next pressing process of the sealing blocks 110 and 120.

Because the packing device of the present invention combines making the film bags and packing the workpieces together, efficiency is upgraded and cost is lowered. Because the portions between the coterminous film bags are in a discontinuously severed state, the film bags are easy to be separated manually.

While exemplary embodiments have been described above, it should be understood that they have been presented by way of example only and not by way of limitation. Thus the breadth and scope of the present invention should not be limited by the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents. 

1. A packing device, comprising: a sealing apparatus, for sealing film bags, the sealing apparatus comprising a pair of sealing blocks, the sealing blocks respectively comprising two pressing portions each defining a receiving hole therein, the receiving holes respectively receiving a heating pole therein to supply heat; a packing apparatus, for packing workpieces and film; and a driving apparatus, for pulling the film and driving the sealing apparatus.
 2. The packing device as claimed in claim 1, wherein the pressing portions of the same sealing blocks are vertically formed with each other.
 3. The packing device as claimed in claim 2, wherein two of the pressing portions of the two sealing blocks respectively define a groove therein, one of the grooves receives a knife-blade therein, and the other receives a cushion opposite to the knife-blade.
 4. The packing device as claimed in claim 3, wherein the knife-blade is zigzag.
 5. The packing device as claimed in claim 3, wherein the pressing portion with the knife-blade therein defines a plurality of threaded holes communicating with the groove, a plurality of bolts are screwed in the threaded holes to fix the knife-blade in the groove.
 6. The packing device as claimed in claim 1, wherein the packing apparatus comprises a packing portion which is a channel having a U-shaped cross-section, and an open side of the packing portion faces to the two sealing blocks.
 7. The packing device as claimed in claim 1, wherein the driving apparatus comprises a controlling portion comprising a pair of mounting portions respectively fixed to the two sealing blocks, and a pair of clamp portions respectively integrally formed with the two mounting portions.
 8. The packing device as claimed in claim 7, wherein at least one spring is fixed between the two clamp portions.
 9. The packing device as claimed in claim 8, wherein the two clamp portions respectively comprise a wheel, and a cam is mounted between the two wheels.
 10. The packing device as claimed in claim 9, wherein the cam defines a through hole surrounded by an inner wall, and a slot is defined in the inner wall, a shaft engaged with a driving spindle of a motor passes through the through hole, and a projecting portion projecting from a side of the shaft is received in the slot.
 11. The packing device as claimed in claim 1, wherein the driving apparatus further comprises a pair of pulling wheels for pulling the film.
 12. The packing device as claimed in claim 1, wherein the opposite sides of the two sealing blocks each define a plurality of channels and ridges thereon.
 13. A sealing apparatus, for sealing film bags, comprises a pair of sealing blocks, the sealing blocks respectively comprising two pressing portions each defining a receiving hole therein, and the receiving holes respectively receive a heating pole therein to supply heat.
 14. The sealing apparatus as claimed in claim 13, wherein the pressing portions of the same sealing blocks are formed vertical to each other.
 15. The sealing apparatus as claimed in claim 14, wherein two of the pressing portions of the two sealing blocks respectively define a groove therein, one of the grooves receives a knife-blade therein, and the other receives a cushion opposite to the knife-blade.
 16. The sealing apparatus as claimed in claim 15, wherein the knife-blade is zigzag.
 17. The sealing apparatus as claimed in claim 15, wherein the pressing portion with the knife-blade therein defines a plurality of threaded holes communicating with the groove, a plurality of bolts are screwed in the threaded holes to fix the knife-blade in the groove.
 18. The sealing apparatus as claimed in claim 13, wherein the opposite sides of the two sealing blocks each define a plurality of channels and ridges thereon.
 19. A packing device comprising: a packing apparatus comprising a packing channel used to guide a spread packing film when the packing film passes through the packing channel, the packing channel comprising a receiving portion to place workpieces to be packed on the spread packing film, and a packing portion to guidably fold the spread packing film for wrapping around the placed workpieces when the spread packing film moves from the receiving portion toward the packing portion; a driving apparatus used to drive movement of the packing film from the receiving portion of the packing apparatus toward the packing portion thereof; and a sealing apparatus installable beside the packing portion of the packing apparatus, and comprising a pair of sealing blocks located at two opposite sides of the packing film passing through the packing portion of the packing apparatus, respectively, the pair of sealing blocks movably approachable to each other for sandwiching the passing packing film between the pair of sealing blocks so as to seal at least two open edges of the passing packing film to form a packing bag in order for packing the placed workpieces therein.
 20. The packing device as claimed in claim 19, further comprising a cam rotatable by driving of the driving apparatus to control approachable movement of the pair of sealing blocks of the sealing apparatus. 